The move came as investigators are still looking into what exactly drove 12-year-old Rebecca Sedwick to her suicide last month, a case in which Vosburg's daughter was charged with aggravated stalking. Police have also arrested a 12-year-old girl.

Judd made it clear that Vosburg's charges are not related to those against the teenagers.

Vosburg's arrest came after authorities received tips from residents that she might have been involved in beating children, Judd said. A minute-long video clip Judd played at a Friday press conference showed a woman, whom he identified as Vosburg, punching two boys with her fist while shouting profanities. The video had been posted to the Internet.

Judd said the mother first argued the beating was an accident but then said it "got out of hand" partly because she was having a bad day.

It wasn't immediately clear who took the video or when and where it was taken. It has since been taken off the Web.

Judd said criminal investigations on both the stalking and abuse cases are underway while Vosburg remains in jail.

The 14-year-old's father, Jose, told CNN's "New Day" on Wednesday that his daughter has an alibi. Jose did not want his last name revealed to the public.

Months of cyberabuse reportedly drove Rebecca to climb up the ladder of a pair of silos at an abandoned concrete plant in September. She had already cut open her wrists in December but survived that suicide attempt.

Weeks after Rebecca leaped to her death, an incriminating message appeared in the Facebook feed of the estranged 14-year-old friend, who was accused of being Rebecca's main tormenter.

"Yes IK I bullied REBECCA nd she killed her self but IDGAF," the message posted Saturday on Facebook read. Judd said the online vernacular meant: "I don't give a (expletive)."

The sheriff called the girl and her family in to see him about the post. Police arrested the daughter.

"She forced this arrest," Judd said.

The 14-year-old couldn't have been the one to post that message, her father told CNN's Chris Cuomo.

The father had just finished watching the news on TV when he found her asleep and sent her to bed. It was about that time that the note landed on Facebook, he said.

"I grabbed the computer and took it to my room, and the only other thing she could have used to send this message was this cell phone, and my cell phone is always with me," he said.

He suspects someone hacked her account.

But the sheriff said he doubts that. Investigators don't believe the teen's Facebook account was compromised, Judd said earlier.